青岛高新区软土地基工程特性及加固地基数值模拟  

Engineering characteristics of soft soil foundation and numerical simulation of foundation reinforcement of Qingdao high-tech zone

作　　者：吕爱欣[1] 洪勇[1] 

机构地区：[1]青岛理工大学土木工程学院,山东青岛266033

出　　处：《工程建设》2014年第6期21-25,共5页Engineering Construction

摘　　要：以青岛高新区软土地基为例,采用低能量强夯联合井点降水法进行软土地基处理。结合现场工况,建立有限元分计算模型,计算分析在强夯冲击荷载作用下,孔隙水压力在荷载作用任意时刻沿深度方向的分布及消散规律,地表位移在冲击荷载作用下的分布规律及其夯坑形状示意,以及土体在夯击和在下的应力变化规律。研究结果表明,低能强夯与真空降水联合加固法处理软土地基取得良好的加固效果,该法可用于大面积软土地基处理。With the soft soil foundation of Qingdao high-tech zone as an example, the method of low-energy dynamic compaction and dewatering is adopted for soft soil foundation treatment. In combination with the field condition, the finite element calculation model is established, the distribution and dissipation rules of pore water pressure along the depth direction at any time under the load action, the distribution rules of surface movement and its compaction pit shape schematics under impact load, and stress change regularities of the soil body under the compaction load are calculated and analyzed. The results show that, good reinforcement effect can be achieved for soft soil foundation treatment by adopting the method of dynamic compaction and dewatering, and this method applies to the large area of soft soil foundation treatment.

关 键 词：软土性质 地基处理 低能量强夯 井点降水 数值分析 

分 类 号：TU472[建筑科学—结构工程] TU447[建筑科学—土工工程]